/* Copyright (c) 2010 Zhihua (Dennis) Jiang
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.gwtmobile.phonegap.kitchensink.client;

import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.dom.client.Document;
import com.google.gwt.dom.client.NativeEvent;
import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.ui.HTMLPanel;
import com.gwtmobile.phonegap.client.Device;
import com.gwtmobile.phonegap.client.Event;
import com.gwtmobile.phonegap.client.Event.Callback;
import com.gwtmobile.ui.client.page.Page;
import com.gwtmobile.ui.client.page.PageHistory;
import com.gwtmobile.ui.client.utils.Utils;
import com.gwtmobile.ui.client.widgets.Button;
import com.gwtmobile.ui.client.widgets.HeaderPanel;

public class KitchenSink implements EntryPoint {

    public static MainUi mainUi;

    @Override
    public void onModuleLoad() {

	if (Utils.isAndroid() || Utils.isIOS()) {

	    if (Utils.isAndroid()) {
		Event.onBackButton(new Event.Callback() {

		    @Override
		    public void onEventFired() {
			onBackKeyDown();
		    }
		});
	    }

	    Event.onDeviceReady(new Callback() {

		@Override
		public void onEventFired() {
		    Timer t = new Timer() {

			@Override
			public void run() {
			    if (mainUi == null) {
				Utils.Console("Loading main ui...");
				mainUi = new MainUi();
				Page.load(mainUi);
			    } else {
				this.cancel();
			    }
			}
		    };
		    t.scheduleRepeating(50);
		}
	    });
	} else {
	    mainUi = new MainUi();
	    Page.load(mainUi);
	}

    }

    public void onBackKeyDown() {
	if (PageHistory.Instance.from() == null) {
	    Device.exitApp();
	} else {
	    if (!PageHistory.Instance.current().getClass().toString().endsWith(".EventUi")) {
		// emulate click on the header back button for page transition
		// to show.
		emulateClickOnBackButton();
	    }
	}
    }

    protected void emulateClickOnBackButton() {
	HTMLPanel current = (HTMLPanel) PageHistory.Instance.current().getWidget();
	HeaderPanel header = (HeaderPanel) current.getWidget(0);
	Button left = header.getLeftButton();
	NativeEvent event = Document.get().createClickEvent(1, 1, 1, 1, 1, false, false, false,
		false);
	left.getElement().dispatchEvent(event);
    }

    // private native void doToast(String msg) /*-{
    // $wnd.PhoneGap.exec(null, null, "GwtMobile", "toast", [msg]);
    // }-*/;
    //
    // private native void requestFocus() /*-{
    // $wnd.PhoneGap.exec(null, null, "GwtMobile", "requestFocus", []);
    // }-*/;

}
